|Chip|Flash size|EEPROM|SRAM|Frequency [MHz]|Package|
|---|---|---|---|---|---|
|AT90S1200|1k|64|0|12|PDIP-20|
|AT90S2313|2k|128|128|10|PDIP-20|
|AT90S/LS2323|2k|128|128|10|PDIP-8|
|AT90S/LS2343|2k|128|128|10|PDIP-8|
|AT90S4414|4k|256|256|8|PDIP-40|
|AT90S/LS4434|4k|256|256|8|PDIP-40|
|AT90S8515|8k|512|512|8|PDIP-40|
|AT90S/LS8535|8k|512|512|8|PDIP-40|

Question: what is the difference in frequency between the at90s1200 and the at90s2313?
Answer: 2